So, there's a four-day long weekend (13th- 16th) in November as well, but personally, I would prefer staying home during Diwali! However, we have heard a lot about Dev Deepawali which is celebrated in Varanasi on 29th November. You should check out our guide on how to reach, and what all to check out when in Varanasi.
We recommend that you get a room at Stay Banaras, which is an affordable heritage BnB.
Distance from Delhi to Varanasi (approx.) - 820 kms.